The paper proposes a metamodelling procedure devoted to provide a reference model to be used by
decision makers in the performance evaluation of Intermodal Transportation Network (ITN). In order to
obtain a generic model describing a nonspecific ITN from the structural and behavioural point of view,
the metamodelling approach consists in applying a top down and modular procedure. The model is
specified by the well known Unified Modelling Language (UML), a graphic and textual modelling
formalism intended to describe systems from structural and dynamics viewpoints. Hence, the paper
models a generic ITN starting from the network description and shows by a case study the metamodel of
one of the most important nodes that compose it: the port subsystem. Moreover, the case study model is
translated in a simulation software and the performance measures obtained by the simulation results are
shown
